MANSFIELD RLTY CO
Multifamily Housing in New York City, NY · 840 EAST 17 ST · 11230
At a glance
MANSFIELD RLTY CO is a 33,600-square-foot multifamily housing building at 840 EAST 17 ST in New York City, New York, built in 1940. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 60 out of 100 (grade C), a site energy-use intensity of 80.2 kBtu/ft² and 154 tCO₂e of greenhouse-gas emissions. That score is higher than 41% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 60 (band C) |
| Site EUI | 80.2 kBtu/ft² |
| Source EUI | 101.2 kBtu/ft² |
| GHG emissions | 154 tCO₂e |
| GHG intensity | 4.6 kgCO₂e/ft² |
| Electricity | 95,569 kWh |
| Water use | 2,686 kgal |
| Gross floor area | 33,600 sq ft |
| Source record | nyc:6268106:2022 |
Compliance context
Local Law 84 (LL84)
Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 840 EAST 17 ST
- City
- New York City
- State
- New York
- ZIP
- 11230
- Coordinates
- 40.63000, -73.96039
Within ~1 km
Nearby benchmarked buildings
- Benchmarking Group - 33score —
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Multifamily Housing · 237,540 sq ft
See also: most efficient in New York City · biggest emitters
How does MANSFIELD RLTY CO compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. MANSFIELD RLTY CO's ENERGY STAR score of 60 compares with an average of 63 across the 22,829 that report a score; it scores higher than 41% of them and lower than 58%. Its site EUI of 80.2 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 4.6 kgCO₂e/ft² is about 12% below the group average of 5.2 kgCO₂e/ft².
At 33,600 sq ft, it is about 67% below the average floor area of 100,951 sq ft for those buildings. It was built in 1940, 12 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
What does an ENERGY STAR score of 60 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 60 means the building performs better than about 60% of its national peers. BuildingCensus bands the score into report-card grades; 60 falls in band C — below median (55–69). It sits 15 points below 75, the threshold for ENERGY STAR certification. In New York City, 43% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. MANSFIELD RLTY CO's 80.2 kBtu/ft² across 33,600 sq ft works out to about 2.7 billion Btu (790 MWh-equivalent) in 2022. Its source EUI of 101.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 95,569 kWh of electricity and 2,686 thousand gallons of water for the year.
Which law requires MANSFIELD RLTY CO to report its energy use?
MANSFIELD RLTY CO reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2022 disclosure (source record nyc:6268106:2022). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
More multifamily housing buildings in New York City
- 143 EAST 34 STREET· 33,585 sq ft · score 25 (D)
- 143 East 34th Street· 33,585 sq ft · score 35 (D)
- 600 E 141st St· 33,580 sq ft · score 18 (D)
- 330 E. 83rd St. Realty Corp. (330 E 83rd St)· 33,580 sq ft · score 27 (D)
- Southern: 774 Fox Street· 33,576 sq ft · score 1 (D)
- 34 Crooke Avenue· 33,574 sq ft · score 53 (D)
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
- Most efficient large buildings in New York City
- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is MANSFIELD RLTY CO's energy grade?
MANSFIELD RLTY CO scores 60 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does MANSFIELD RLTY CO use?
Its 2022 site energy-use intensity was 80.2 kBtu/ft² (101.2 kBtu/ft² source) across 33,600 sq ft, including 95,569 kWh of electricity.
What are MANSFIELD RLTY CO's carbon emissions?
MANSFIELD RLTY CO reported 154 tCO₂e of greenhouse-gas emissions (4.6 kgCO₂e/ft²) for 2022.
Where is MANSFIELD RLTY CO?
MANSFIELD RLTY CO is at 840 EAST 17 ST, in New York City, New York 11230. Its coordinates are 40.63000, -73.96039 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is MANSFIELD RLTY CO and when was it built?
MANSFIELD RLTY CO has 33,600 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1940 as its year built. It is classed as multifamily housing.
Is MANSFIELD RLTY CO covered by Local Law 84 (LL84)?
Yes — it appears in the 2022 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
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About this data
Source: Energy and Water Data Disclosure (Local Law 84 (LL84)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “MANSFIELD RLTY CO, New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/mansfield-rlty-co-ae479b72 (data as of October 2, 2026).